Police say Coley fired shots which struck and killed O'Rourke. Zimballatti says O'Rourke saved her life when he helped guide her to an armored vehicle.

Once she was safe and away from danger, she learned there had been an officer shot and killed. Zimballatti was devastated to learn it was officer O'Rourke.

"It's been a lot of conflicted emotions because officer O'Rourke's last encounter with me was to make sure we were safe, and just to know that he lost his life soon after is kind of painful," said Zimballatti.

Other neighbors also received a warning Sunday night from O'Rourke. He offered a sense of calm during the chaotic situation.

"I walked out the house. Within 5 seconds I heard 10-12 shots. I said, 'Lord, God, let no one be hurt,'" said Najib Ayar, who lives nearby. "I heard someone call officer down."

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